The OSFP module on the network card side should be using OSFP-flat, right? Why is it said to use OSFP-Riding Heatsink?

Yes, the network card uses flat modules. The term "riding heatsink" refers to a heatsink that is mounted on the cage.

Is there a distinction between simplex and duplex for IB network cards?

They are all duplexes. The terms simplex or duplex are merely conceptual for current devices, as the physical channels for sending and receiving have already been separated.

Can CX7 dual-port 400G achieve 800G through bonding, and why can 200G bonding reach 400G?

Currently, the CX7 does not have a dual-port 400G configuration. The overall network performance is determined by the bottlenecks of PCIe bandwidth, the network card's processing capability, and the physical bandwidth of the ports. The maximum PCIe bandwidth is 512G, and the network card's processing capability is greater than 400G, so bonding two 200G ports can achieve a bandwidth of 400G.

How to change FEC mode on ConnectX-7 NIC ?how to change RS_FEC_PLR - (272,257+1) to RS-FEC - (544,514) ?

Changing the FEC mode for Infiniband devices is not supported. The FEC mode is configured during autonegotiation based on device capabilities and firmware.

NVIDIA MCX75310AAS-HEAT ConnectX-7 VPI Adapter Card NDR/200GbE

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NVIDIA/Mellanox MCX75310AAS-HEAT ConnectX®-7 InfiniBand Adapter Card, NDR200 200Gb/s, Single-Port OSFP, PCIe 4.0/5.0 x 16, Tall Bracket

Name: NVIDIA/Mellanox MCX75310AAS-HEAT ConnectX®-7 InfiniBand Adapter Card, NDR200 200Gb/s, Single-Port OSFP, PCIe 4.0/5.0 x 16, Tall Bracket
Brand: Naddod
SKU: 102394
Price: 1099.00 USD
Availability: OnlineOnly
Rating: 5.0 (18 reviews)

#102394

Model: MCX75310AAS-HEAT

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$ 1099.00

Adapter Types:

MCX75310AAS-HEAT

MCX75310AAS-HEAT

Brand:

NVIDIA/Mellanox (InfiniBand)

Item Spotlights

PCIe 4.0/5.0 x16 Host Interface and NDR200 200Gb/s Single-Port Transmission
RDMA Delivering Low Latency and High Performance
ASAP technology accelerates software-defined networking
Provide Security from Edge to Core with inline encryption/decryption of TLS, IPsec, and MACsec
End-to-end QoS and Congestion Control to Anticipate and Eliminate Congestion
Smart Interconnect for x86, Power, Arm, GPU and FPGA-based Compute and Storage Platforms

NVIDIA/Mellanox MCX75310AAS-HEAT ConnectX®-7 InfiniBand Adapter Card, NDR200 200Gb/s, Single-Port OSFP, PCIe 4.0/5.0 x 16, Tall Bracket

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Specifications

Applications

Product Highlights

Questions & Answers

Resources

Specifications

Applications

Product Highlights

Questions & Answers

Resources

Description

NVIDIA/Mellanox MCX75310AAS-HEAT ConnectX®-7 InfiniBand Adapter Card, NDR200 200Gb/s, Single-Port OSFP, PCIe 4.0/5.0 x 16, Tall Bracket

ConnectX®-7 family of Remote Direct Memory Access (RDMA) network adapters supports InfiniBand and Ethernet protocols and a range of speeds up to 400Gb/s. It enables a wide range of smart, scalable, and feature-rich networking solutions that address traditional enterprise needs up to the world’s most-demanding AI, scientific computing, and hyperscale cloud data center workloads.

Specifications

Part Number

MCX75310AAS-HEAT

Data Transmission Rate

InfiniBand: SDR/FDR/EDR/HDR100/HDR/NDR200

Network Connector Type

Single-port OSFP

Application

InfiniBand

Host Interface

PCIe x16 Gen 4.0/5.0 @ SERDES 16GT/s/32GT/s

Technology

RDMA

Adapter Card Size

6.6 in. x 2.71 in. (167.65mm x 68.90mm)

RoHS

RoHS Compliant

Temperature

Operational: 0°C to 55°C
Storage: -40°C to 70°C

Supported operating systems

Linux, Windows, VMware

Connectivity Solutions

Applications

Product Highlights

GPUDirect RDMA: Enabling Direct Data Transfer Between GPUs for Enhanced Cluster Efficiency

GPUDirect enables direct memory-to-memory data transfer between GPUs, significantly improving efficiency by reducing bandwidth and latency, and optimizing GPU cluster performance.

Advanced Network Offloads: Accelerating Data Plane, Network, Storage, and Security for Enhanced Host Efficiency

Offloads I/O-related operations from the CPU, enabling in-network computing and memory functions, significantly improving host performance.

Accelerating Network Performance: Enhancing Speed and Reducing CPU Overhead in IP Packet Transmission

Utilizes accelerated switching and packet processing technologies to boost network performance and reduce CPU overhead in IP packet transmission, freeing up processor cycles for applications.

Questions & Answers

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Can the CX7 network card in Ethernet mode interconnect with other manufacturers' 400G Ethernet switches that support RDMA?

Yes, but in this case, the operating performance is not guaranteed. For 400G Ethernet, it is recommended to use the Spectrum-X platform composed of BF3 and Spectrum-4.

What are the differences between the OSFP interface modules on the network card side and the switch side?

On the network card side, flap top modules are used, and the CX7 network card utilizes 400G OSFP modules. On the switch side, twin port 400G modules are used, which have a finned top and are thicker than the flap top modules. The DGX H800 computing network interface (host side) also uses twin port 400G modules, but they are flap top, and compared to the switch modules, they have a suffix of -flt.

Does the IB card in Ethernet mode support RDMA?

Yes, it supports Ethernet RDMA, specifically RoCE (RDMA over Converged Ethernet). For large-scale networking, the NVIDIA Spectrum-X solution is recommended.

Resources

NVIDIA ConnectX-7 InfiniBand Adapter Cards Datasheet

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